Asus P4B ASUS P4B motherboard user guide, •Keyboard Lock Lead (2-pinKEYLOCK), 17.System panel connector (20-pinPANEL), •System Power LED Lead (3-1pin PWR.LED)

16.Power supply thermal connector (2-pin TRPWR)

If your power supply has a thermal monitoring feature, connect its thermal sensor cable to this connector.

	TRPWR
P4B	Ground
	TRPWR

P4B Power Supply Thermal Connector

Figure 2-46 Power Supply Thermal Connector

17.System panel connector (20-pin PANEL)

This connector accommodates several system front panel functions.

P4B

P4B System Panel Connectors

Keyboard Lock		Speaker
Power LED		Connector
			Ground Ground Speaker
+5 V	PLED Keylock Ground	+5V
+5 V	MLED ExtSMI# Ground PWR Ground		Reset Ground
MessageLED			Reset SW
		ATX Power
SMI Lead
		Switch*

*Requires an ATX power supply.

Figure 2-47 System Panel Connector

•System Power LED Lead (3-1 pin PWR.LED)

This 3-1 pin connector connects to the system power LED. The LED lights up when you turn on the system power, and blinks when the system is in sleep mode.

•Keyboard Lock Lead (2-pin KEYLOCK)

This 2-pin connector connects to a chassis-mounted switch to allow the use of the keyboard lock feature.

ASUS P4B motherboard user guide 2-33